Advertisements
Advertisements
प्रश्न
Describe the lines of longitude and state their use in relation to distance and time.
उत्तर
Longitude is the angular distance of a place east or we§t of the Prime Meridian or 0° longitude.
The lines of longitude are the great semi-circles joining North pole and South pole and are equal in length. These are 0° – 180°E and 0° – 180°W longitudes or total 360°. As the earth takes 24 hours to make a complete rotation along its axis crossing 360° lines of longitude, so earth takes nearly 4 minutes to move one degree (1 °) longitude or 111 km length or distance. There is a difference in time of one hour between 15° interval of longitudes. According to the clock-time, EGA stands for East-Gain-Add and WLS means West Lose Subtract. In other words for every 10 longitudes towards east 4 minutes are to be added and towards west for each 1° longitude 4 minutes are to be subtracted.
APPEARS IN
संबंधित प्रश्न
Which line of longitude is used to fix the World Standard Time? State its value in degrees.
Give a reason for the following:
Lines of longitude are also called Meridians of longitude?
With reference to the International Date Line, state the following:
It is meaning and application.
Name the two hemispheres of the Earth made by the equator?
Give a reason for the following :
All parallel other than equator are not Great Circles.
What adjustment has to be made when ships cross the International Date Line?
OR
Explain why a day appears to be lost in sailing round the world from east to west and gained when travelling from west to east.
(a) What is the rule of changing the date while crossing the international date line?
(b) What is meant by ‘six-day week’ and ‘eight-day week’?
From the westernmost point to the easternmost point, the local times of India extend over a time difference of ______.
Russia extends over ______ time zones.
What are Western Longitudes?
